soccer break

As a father of 2 boys and a fan of soccer myself, I can't stand mixing the beautiful sport with politics, fascism etc.
Soccer, as any sport, should be about fun and joy!
What happened last night in Athens is absolutely disgusting.
Some "fans" were holding this nationalistic banner

reading
Nož, žica, Srebrenica
referring to this massacre that happened in 1995.

Such an action should be prohibited to happen ever again...

The "fans" that were holding this banner must not be allowed to watch ANY game for the rest of their lives.

What are FIFA and the police are going to do to tackle these brainless fans bringing nationalism, fascism and racism into soccer grounds?